A circular, single or multipiece item, metallic or nonmetallic in composition, designed to be fitted in a circumferential groove in a piston and to spring outward against the cylinder wall to function as a seal or wiper. It is supplied in various cross-sectional shapes and is cut through at one point to allow for installation in the piston ring groove. It may include an expander. Excludes packing, preformed; retainer, oil seal; retainer, packing; ring, retaining; ring wiper; and seal ring, metal.
Classification: Parts for steam turbines
NSN 6135-00-840-6451
NSN 7035-00-163-6221
NSN 6650-01-270-8460
NSN 6685-01-045-7446
NSN 6145-00-553-8196
NSN 5930-01-537-0836
NSN 5925-00-059-4991
NSN 5935-01-050-0644
NSN 4140-01-463-4624
NSN 5930-00-807-8744
NSN 7035-00-897-7567
NSN 5999-01-444-6501